i2c-8815nhk.c

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#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/i2c-gpio.h>
#include <linux/platform_device.h>
#include <plat/gpio-nomadik.h>
#include <plat/pincfg.h>

/*
 * There are two busses in the 8815NHK.
 * They could, in theory, be driven by the hardware component, but we
 * use bit-bang through GPIO by now, to keep things simple
 */

/* I2C0 connected to the STw4811 power management chip */
static struct i2c_gpio_platform_data nhk8815_i2c_data0 = {
    /* keep defaults for timeouts; pins are push-pull bidirectional */
    .scl_pin = 62,
    .sda_pin = 63,
};

/* I2C1 connected to various sensors */
static struct i2c_gpio_platform_data nhk8815_i2c_data1 = {
    /* keep defaults for timeouts; pins are push-pull bidirectional */
    .scl_pin = 53,
    .sda_pin = 54,
};

/* I2C2 connected to the USB portions of the STw4811 only */
static struct i2c_gpio_platform_data nhk8815_i2c_data2 = {
    /* keep defaults for timeouts; pins are push-pull bidirectional */
    .scl_pin = 73,
    .sda_pin = 74,
};

static struct platform_device nhk8815_i2c_dev0 = {
    .name   = "i2c-gpio",
    .id = 0,
    .dev    = {
        .platform_data = &nhk8815_i2c_data0,
    },
};

static struct platform_device nhk8815_i2c_dev1 = {
    .name   = "i2c-gpio",
    .id = 1,
    .dev    = {
        .platform_data = &nhk8815_i2c_data1,
    },
};

static struct platform_device nhk8815_i2c_dev2 = {
    .name   = "i2c-gpio",
    .id = 2,
    .dev    = {
        .platform_data = &nhk8815_i2c_data2,
    },
};

static pin_cfg_t cpu8815_pins_i2c[] = {
    PIN_CFG_INPUT(62, GPIO, PULLUP),
    PIN_CFG_INPUT(63, GPIO, PULLUP),
    PIN_CFG_INPUT(53, GPIO, PULLUP),
    PIN_CFG_INPUT(54, GPIO, PULLUP),
    PIN_CFG_INPUT(73, GPIO, PULLUP),
    PIN_CFG_INPUT(74, GPIO, PULLUP),
};

static int __init nhk8815_i2c_init(void)
{
    nmk_config_pins(cpu8815_pins_i2c, ARRAY_SIZE(cpu8815_pins_i2c));
    platform_device_register(&nhk8815_i2c_dev0);
    platform_device_register(&nhk8815_i2c_dev1);
    platform_device_register(&nhk8815_i2c_dev2);

    return 0;
}

static void __exit nhk8815_i2c_exit(void)
{
    platform_device_unregister(&nhk8815_i2c_dev0);
    platform_device_unregister(&nhk8815_i2c_dev1);
    platform_device_unregister(&nhk8815_i2c_dev2);
    return;
}

module_init(nhk8815_i2c_init);
module_exit(nhk8815_i2c_exit);